"We've had lots of questions about the cute kid popping up in our photos lately," the Strong and Kind author, 42, captioned an Instagram pic with her children. "We are excited to be in the process of adopting a new son! He's been with us since May, but we wanted some privacy and time for him and our family to bond before telling the world.

"He's amazing, and we are all so thrilled to have another kid around the house," she continued. "Couldn't keep the good news to ourselves any longer! We appreciate your prayers and support for our family!"

The Louisiana native and her husband, 43, share John Luke, 20, Sadie, 18, and Willie Jr. and Bella, both 13. The couple adopted Willie Jr. when he was a baby. Their oldest child, Rebecca — who announced her engagement on Sunday —was an exchange student who became their foster child in 2004.

As Us Weekly exclusively reported, Rebecca, 27, and boyfriend John Reed Loflin got engaged on a beach in Florida on New Year's Eve when they went looking for shells.

“We had been walking searching for about an hour, and I saw this beautiful swirly shell hidden in the sand, and the ring was also hiding in there, and he got on his one knee as I pulled the ring out, and he said, ‘I want to spend the rest of my life with you. Will you spend the rest of your life with me?’” Rebecca told Us.